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(.module:
[lux #*
["." host]
[abstract
["." equivalence (#+ Equivalence)]
[monad (#+ do)]]
[control
["." state (#+ State)]
["." try (#+ Try)]
["." exception (#+ exception:)]]
[data
[number
["." i32]
["n" nat]
["." int]
["." frac]]
["." text
["%" format (#+ format)]]
[format
[".F" binary (#+ Writer) ("specification@." monoid)]]
[collection
["." row (#+ Row) ("#@." fold)]]]
[type
abstract]
[macro
["." template]]]
["." // (#+ UTF8 String Class Integer Float Long Double Constant Name-And-Type Reference)
[//
[encoding
["#." name (#+ Internal External)]
["#." unsigned]]
["#." index (#+ Index)]
["#." descriptor (#+ Field Method Descriptor)]]])
(type: #export Pool [Index (Row [Index Constant])])
(def: #export equivalence
(Equivalence Pool)
(equivalence.product //index.equivalence
(row.equivalence (equivalence.product //index.equivalence
//.equivalence))))
(template: (!add <tag> <=> <value>)
(function (_ [next pool])
(with-expansions [<try-again> (as-is (recur (.inc idx)))]
(loop [idx 0]
(case (row.nth idx pool)
(#.Some entry)
(case entry
[index (<tag> reference)]
(if (:: <=> = reference <value>)
[[next pool]
index]
<try-again>)
_
<try-again>)
#.None
(let [new (<tag> <value>)]
[[(|> next
//index.number
(//unsigned.u2/+ (//unsigned.u2 (//.size new)))
//index.index)
(row.add [next new] pool)]
next]))))))
(template: (!raw-index <index>)
(|> <index> //index.number //unsigned.nat))
(exception: #export (invalid-index {index (Index Any)})
(exception.report
["Index" (|> index !raw-index %.nat)]))
(exception: #export (invalid-constant {index (Index Any)}
{tag Name})
(exception.report
["Index" (|> index !raw-index %.nat)]
["Expected tag" (%.name tag)]))
(template: (!fetch <tag> <index>)
(with-expansions [<failure> (as-is [[next pool] (exception.throw ..invalid-index [<index>])])]
(function (_ [next pool])
(loop [idx 0]
(case (row.nth idx pool)
(#.Some [index entry])
(let [index' (!raw-index index)
<index>' (!raw-index <index>)]
(cond (n.< index' <index>')
(recur (inc idx))
(n.= index' <index>')
(case entry
(<tag> value)
[[next pool] (#try.Success value)]
_
[[next pool] (exception.throw ..invalid-constant [<index> (name-of <tag>)])])
## (n.> index' <index>')
<failure>))
#.None
<failure>))
)))
(exception: #export (cannot-find {tag Name} {value Text})
(exception.report
["Expected tag" (%.name tag)]
["Value" value]))
(template: (!find <tag> <=> <%> <expected>)
(function (_ [next pool])
(with-expansions [<try-again> (as-is (recur (.inc idx)))]
(loop [idx 0]
(case (row.nth idx pool)
(#.Some [index entry])
(case entry
(<tag> actual)
(if (:: <=> = actual <expected>)
[[next pool]
(#try.Success index)]
<try-again>)
_
<try-again>)
#.None
[[next pool]
(exception.throw ..cannot-find [(name-of <tag>) (<%> <expected>)])])))))
(type: (Adder of)
(-> of (State Pool (Index of))))
(type: (Fetcher of)
(-> (Index of) (State Pool (Try of))))
(type: (Finder of)
(-> of (State Pool (Try (Index of)))))
(template [<name> <type> <tag> <equivalence> <format>]
[(def: #export (<name> value)
(Adder <type>)
(!add <tag> <equivalence> value))
(`` (def: #export ((~~ (template.identifier ["fetch-" <name>])) index)
(Fetcher <type>)
(!fetch <tag> index)))
(`` (def: #export ((~~ (template.identifier ["find-" <name>])) reference)
(Finder <type>)
(!find <tag> <equivalence> <format> reference)))]
[integer Integer #//.Integer (//.value-equivalence i32.equivalence) (|>> //.value .nat %.nat)]
[float Float #//.Float (//.value-equivalence //.float-equivalence) (|>> //.value host.float-to-double %.frac)]
[long Long #//.Long (//.value-equivalence int.equivalence) (|>> //.value %.int)]
[double Double #//.Double (//.value-equivalence frac.equivalence) (|>> //.value %.frac)]
[utf8 UTF8 #//.UTF8 text.equivalence %.text]
)
(def: #export (string value)
(-> Text (State Pool (Index String)))
(do state.monad
[@value (utf8 value)
#let [value (//.string @value)]]
(!add #//.String (//.value-equivalence //index.equivalence) value)))
(def: #export (class name)
(-> Internal (State Pool (Index Class)))
(do state.monad
[@name (utf8 (//name.read name))
#let [value (//.class @name)]]
(!add #//.Class //.class-equivalence value)))
(def: #export (descriptor value)
(All [kind]
(-> (Descriptor kind)
(State Pool (Index (Descriptor kind)))))
(let [value (//descriptor.descriptor value)]
(!add #//.UTF8 text.equivalence value)))
(type: #export (Member of)
{#name UTF8
#descriptor (Descriptor of)})
(def: #export (name-and-type [name descriptor])
(All [of]
(-> (Member of) (State Pool (Index (Name-And-Type of)))))
(do state.monad
[@name (utf8 name)
@descriptor (..descriptor descriptor)]
(!add #//.Name-And-Type //.name-and-type-equivalence
{#//.name @name
#//.descriptor @descriptor})))
(template [<name> <tag> <of>]
[(def: #export (<name> class member)
(-> External (Member <of>) (State Pool (Index (Reference <of>))))
(do state.monad
[@class (..class (//name.internal class))
@name-and-type (name-and-type member)]
(!add <tag> //.reference-equivalence
{#//.class @class
#//.name-and-type @name-and-type})))]
[field #//.Field Field]
[method #//.Method Method]
[interface-method #//.Interface-Method Method]
)
(def: #export writer
(Writer Pool)
(function (_ [next pool])
(row@fold (function (_ [_index post] pre)
(specification@compose pre (//.writer post)))
(binaryF.bits/16 (!raw-index next))
pool)))
(def: #export empty
Pool
[(|> 1 //unsigned.u2 //index.index)
row.empty])
|
